Type 3277 Actuator - Samson TROVIS 3730-3 Mounting And Operating Instructions

Mounting and start-up
5.3.2 Type 3277 Actuator
Actuators with 175 to 750 cm² effective ar-
eas (see Fig. 8)
Î Required mounting parts and accesso-
ries: Table 3 on page 22.
Î Observe travel tables on page 26.
1. Place follower clamp (3) on the actuator
stem, align it and screw tight so that the
mounting screw is located in the groove
of the actuator stem.
2. Mount cover plate (10) with narrow side
of the cut-out (Fig. 8, on the left) pointing
towards the signal pressure connection.
Make sure that the gasket (14) points to-
wards the actuator yoke.
3. Check the pin position of the follower pin
(2) on M lever (1). Refer to travel tables
for type of attachment. If necessary,
change the pin position (see section 5.2).
4. Insert formed seal (15) into the groove of
the positioner housing.
5. Place positioner on the cover plate in
such a manner that the follower pin (2)
rests on the top of the follower clamp (3).
Adjust the lever (1) correspondingly and
open the positioner cover to hold the po-
sitioner shaft in position at the shaft lock
(Fig. 2 on page 19). The lever (1)
must rest on the follower clamp with
spring force.
Mount the positioner on the cover plate
(10) using the two fixing screws.
42
6. Make sure that the tip of the gasket (16)
projecting from the side of the connec-
tion block is positioned to match the ac-
tuator symbol for the actuator's fail-safe
action "actuator stem extends" or "actu-
ator stem retracts". If this is not the case,
unscrew the three fastening screws and
lift off the cover. Turn the gasket (16) by
180° and re-insert it.
7. Place the connection block (12) with the
associated seals against the positioner
and the actuator yoke and fasten using
the screw (12.1). For actuators with fail-
safe action "actuator stem retracts", ad-
ditionally remove the stopper (12.2) and
mount the external signal pressure pipe.
8. Mount cover (11) on the other side.
Make sure that the vent plug is located at
the bottom when the control valve is in-
stalled to allow any condensed water
that collects to drain off.
EB 8484-3 EN